Comment 4 for bug 1235435

From what the logs show it looks like nova-compute goes in some sort of loop where it keeps getting network info: See nova-cpu and nova-cond logs:

http://logs.openstack.org/03/56303/2/check/check-tempest-devstack-vm-neutron-pg/23f03ba/logs/screen-n-cpu.txt.gz
http://logs.openstack.org/03/56303/2/check/check-tempest-devstack-vm-neutron-pg/23f03ba/logs/screen-n-cond.txt.gz

and search for request:

req-8c5d20d1-5191-4683-8fb8-25570e72bf97

Whether that's induced by a Neutron failure remains to be seen. I'll keep digging.